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# MTLDeviceNotificationName

A notification that represents a change to a GPU device in the system.

```
struct MTLDeviceNotificationName
```

## Topics

### Creating a notification name

[`wasAdded`](/documentation/Metal/MTLDeviceNotificationName/wasAdded)

A notification that Metal sends to observers when the system adds a GPU device.

[`removalRequested`](/documentation/Metal/MTLDeviceNotificationName/removalRequested)

A notification that Metal sends to observers when a person requests to remove a GPU device from the system.

[`wasRemoved`](/documentation/Metal/MTLDeviceNotificationName/wasRemoved)

A notification that Metal sends to observers when the system removes a GPU device.

[`init(rawValue:)`](/documentation/Metal/MTLDeviceNotificationName/init(rawValue:))

Creates a Metal device notification name from a string.


---

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